Most Fuel-Efficient Cars

Most Fuel-Efficient Cars

The Environmental Protection Agency numbers listed here are based on 45% highway, 55% city driving. The organization assumed 15,000 annual miles at $3.51 per gallon. Originally calculated to determine CO2 emissions, the EPA's miles per gallon rating, in the past, had been notoriously spotty. When tests were previously conducted entirely in labs, agency calculations had been off by as much as 50 percent. This year, however, the EPA instituted new guidelines that better mimic real-world conditions